Improvement in heating-stoves



D. N. MASON.

Heating Stoves.

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IMPRVEMENT IN Specification forming part of Letters Patent No HEATING-STOVES.

. 139,256, dated May 27, 1873; application filed January 10, 1873.

To vall whom it may concern:

Be it known that I, DARWIN N. MASON, of Indianola, in the county of Warren and State of Iowa, have invented certain Improvements in Heating-Stoves, of which the following is a specification My invention consists of a combination of air chambers and tubes in such a way that the air of a room to be warmed is made to iiow in regular currents through them, and for the purposes of more economical and uniform Warming, together with a more perfect and heathful ventilation of dwellings. This aps may be accommodated, in its form and size, to any of the ordinary shapes of stoves or furnaces. That herein described is accommodated in form and dimensions to an upright cylindrical stove of the ordinary parlor size.

Jlhe accompanying drawing shows the arrangement and combination of parts which I claim as my invention.

A is a circular cast-lron fire-bottom. It is" oles around the outer edge. These holes should be one and a half inch in diameter and six inches apart. B is a hollow cylindrical turret of cast-iron rising three or four inches through a perforation in the center of the fire-bottom A. It is closed at the top and pierced with holes around the upper edge, except on the side toward the door admitting the fuel. These holes are one and a halt inch in diameter, and in number one less than those in the firebottom A. The diameter of the turret should not exceed onethird of the diameter ofthe fire-bottom A. C is a shallow sheet-iron pan or false bottom, corresponding in shape and size to the rebottom A, and perforated at one end with an eight-inch circular hole, c. This false bottom is fastened to the under side of the plate A, so as to make a space of two inches between the two, thus forming an air-chamber into which the cold air freely iiows through the hole c. e e c are tubes of wrought or cast iron tted to the holes in the turret B, and projecting outward to within half an inch of the and thence upward through d d d are straight tubes A and the plate D, alterinclosing-shield, the iron plate D piercing the plate nating with the bent ones, communication between the air-chamber below and the air-chamber above. low cylindrical cap eight inches deep, which, fitted over the plate D, forms the upper airchamber. In the side is a row of holes two inches in diameter, corresponding in number to the pipes piercing the plate I), through which the air escapes into the room after it has passed into the lower through the heated tubes. These holes may be opened or closed at pleasure by means of a slide. In the top of this cap is a ten-inch hole, n, to which a pipe may be fitted, when it is desirable, cent room. In like manner a pipe may be Iitted to the hole c of the lower air-chamber, by means of which the cold air of an adjacent room may be drawn off While hot air is flowing in. Fis the grate made to contain the fuel and resting on the. turret B, the upper edge bearing on the perp endicular tubes. The smoke-pipe f pierces the shield on the side opposite the door and just below the plate D. The ventilator h enters the upper air-chamber through the side ofthe cap, and is opened or closed b closing all the apertures in the upper airchamber and opening the ventilator the bottom air of a room may soon be drawn up the chimney, thus accomplishing the most perfect and healthful ventilation possible.

I claim as my invention- `The combination of the air-chamber below the tire, formed by the turret'B and the false bottom 0, and the tubes c e e d d d, with the upper air-chamber, formed by the'plate D and the cap E, and the ventilator h, substantially as and for the purposes hereinbefore set forth.

t DARWIN N. MASON. Witnesses:

ALEXANDER NEWMAN, JOHN T. WEsToN.

thus making free E is a hol-` air-chamber and to conduct the hot air to an adjay a slide or close-fitting damper. By 

